255606403 has 4 divisors (see below), whose sum is σ = 275268448. Its totient is φ = 235944360.

The previous prime is 255606401. The next prime is 255606419. The reversal of 255606403 is 304606552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255606403 - 2¹ = 255606401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255606401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9831003 + ... + 9831028.

It is an arithmetic number, because the mean of its divisors is an integer number (68817112).

Almost surely, 2^255606403 is an apocalyptic number.

255606403 is a deficient number, since it is larger than the sum of its proper divisors (19662045).

255606403 is a wasteful number, since it uses less digits than its factorization.

255606403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19662044.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 255606403 is about 15987.6953623717. The cubic root of 255606403 is about 634.6348391356.

The spelling of 255606403 in words is "two hundred fifty-five million, six hundred six thousand, four hundred three".